445347963649 has 4 divisors (see below), whose sum is σ = 445381022164. Its totient is φ = 445314905136.

The previous prime is 445347963623. The next prime is 445347963661. The reversal of 445347963649 is 946369743544.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 218900465424 + 226447498225 = 467868^2 + 475865^2 .

It is a cyclic number.

It is not a de Polignac number, because 445347963649 - 2⁵ = 445347963617 is a prime.

It is a super-2 number, since 2×445347963649² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445347966649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16509042 + ... + 16535995.

It is an arithmetic number, because the mean of its divisors is an integer number (111345255541).

Almost surely, 2^445347963649 is an apocalyptic number.

It is an amenable number.

445347963649 is a deficient number, since it is larger than the sum of its proper divisors (33058515).

445347963649 is a wasteful number, since it uses less digits than its factorization.

445347963649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33058514.

The product of its digits is 235146240, while the sum is 64.

The spelling of 445347963649 in words is "four hundred forty-five billion, three hundred forty-seven million, nine hundred sixty-three thousand, six hundred forty-nine".